809788494 has 8 divisors (see below), whose sum is σ = 1619577000. Its totient is φ = 269929496.

The previous prime is 809788487. The next prime is 809788543. The reversal of 809788494 is 494887908.

It is a sphenic number, since it is the product of 3 distinct primes.

809788494 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67482369 + ... + 67482380.

It is an arithmetic number, because the mean of its divisors is an integer number (202447125).

Almost surely, 2^809788494 is an apocalyptic number.

809788494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

809788494 is a wasteful number, since it uses less digits than its factorization.

809788494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134964754.

The product of its (nonzero) digits is 4644864, while the sum is 57.

The square root of 809788494 is about 28456.7829172589. The cubic root of 809788494 is about 932.0886091283.

The spelling of 809788494 in words is "eight hundred nine million, seven hundred eighty-eight thousand, four hundred ninety-four".